Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 8 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/31/2021   18:39:50   (   0.14, -75.21) (  -0.70, -78.89)  420.31                80
 09/01/2021   18:23:46   (   0.14, -75.21) (   0.35, -74.37)   96.07                80
 09/04/2021   06:24:10   (  -0.15, -75.21) (  -0.17, -75.11)   11.52                80
 09/06/2021   18:27:23   (   0.15, -75.23) (  -0.01, -75.88)   74.95                80
 09/07/2021   18:11:20   (   0.15, -75.24) (   1.05, -71.36)  442.32                80
 09/09/2021   06:33:07   (  -0.15, -75.25) (   0.18, -76.62)  157.21                80
 09/10/2021   06:11:43   (  -0.15, -75.25) (  -0.88, -72.10)  360.17                80
 09/11/2021   18:33:41   (   0.16, -75.27) (  -0.29, -77.41)  242.40                80
 09/12/2021   18:17:36   (   0.16, -75.28) (   0.71, -72.87)  275.15                80